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1
Transactions of the Canadian Institute
Van Tieghem states that of closely allied species some may have a medullated
monostelic central cylinder, while others have the astelic type of central cylinder.
For example, in the Equisetaceae, E. art'ense is monostelic, E. limasum, on the ...
Royal Canadian Institute, Canadian Institute (1849-1914), 1899
2
Transactions of the Canadian Institute
Van Tieghem states that of closely allied species some may have a medullated
monostelic central cylinder, while others have the astelic type of central cylinder.
For example, in the Equisetaceae, E. arvense is monostelic, E. limosum, on the ...
Canadian Institute (1849-1914), Canadian Institute, 1899
Van Tieghem states that of closely allied species some may have a medullated
monostelic central cylinder, while others have the astelic type of central cylinder.
For example, in the Equisetaceae, E. arvense is monostelic, E. limosum, on the ...
Canadian Institute (1849-1914), 1899
... internodes the xylem has the form of a continuous ring enclosing a central pith.
Another point of contact between the fossil plant and recent ferns is afforded by
the Gleicheniaceous genus Plalyzoma, in which the monostelic stem possesses
...
Sir Henry C. Burdett, John Bretland Farmer, 1897
Van Tieghem, in his T realise on Botany, has a section on the return from
polystelic or astelic to monostelic structure (5, p. 767). In the pedicel of an
Auricula, for example, the separate steles first become fused laterally, giving rise
to the ...
is needed, however, especially to find out if possible the physiological value of
the endodermis. Possibly such work would lead to the discovery of the reason
why some species of this genus are monostelic, and apparently normal in every
way, ...
7
Philosophical Transactions of the Royal Society of London
views as fallacious, because the primary ground-plan of the stem-structure of a
polystelic Mcdullosa was fundamentally different from that of the monostelic
Cycadaceae, though the ultimate result, in old stems, may have a certain
similarity.
8
Botany For Degree Gymnosperm (M.E.)
Scott (1909, 1923) believed that the cycad eustele originated from the monostelic
Lyginopteridaceae. Arnold (1953) has supported this view. Beck (1970) and
Namboodri and Beck (1968) also traced the origin of gymnospermous eustele
from ...
P C Vashishta, A K Sinha, Anil Kumar, P.C.Vasishta
9
Paleobotany and the Evolution of Plants
Recent evidence from Mississippian specimens shows us that monostelic
medullosan stems (Quaestora) coexisted with "polystelic" forms. The discoverers
of Quaestora (Mapes & Rothwell, 1980) suggest that dissection of such a
monostelic ...
Wilson Nichols Stewart, 1993
10
Ancient Plants : Being a Simple Account of the Past ...
Stele of Asterochlaena, showing its deeply lobed nature In their anatomy all the
members of the family have monostelic structure (see p. 62). This is noteworthy,
for at the present time though a number of genera are monostelic, no family
whose ...
